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Tuesday, 25 October 2011

Some malware sites to block

These sites and IPs seem to be distributing some sort of Zeus variant. In this case users are being enticed to download a file called Fattura.zip (Italian for "invoice") which then contains an executable with the name Fattura.Doc_________________________________________________________________.exe (there are 65 underscores in the filename). That seems daft until you realise that all those underscores are designed to hide the .exe extension by making the filename so big that it is truncated.

At the moment, the malware (MD5 09886612d542e1b354aeda6a16f9ccf5) is poorly detected (4/43 at VirusTotal). ThreatExpert's prognosis is here.

The back end is a big more interesting and gives a large number of IPs and domains to block if you want to be proactive about stopping this sort of thing.